why was it critical for good pioneer trails going west to have a decent route through the Rocky mountains

What does this interaction reveal about antony's agenda? o he intends to make lepidus one of the leaders of the divided empire o he intends to make lepidus a servant who runs errands o he plans to have lepidus tried and executed for his past o he plans to remove lepidus from power once he has and carries loads cimes served his purpose.